VoidItemMenuClickEvent event added - fired whenever you click on the menu inventory.

The item setup logic has changed. From now, if you set the slots to "all", items will be replaced instead of ignored if there is already an item in any specific slot. However the order of how items are added has also changed.

Decoration items are added first so it is suggested that if you want "barrier" blocks perhaps, add them first and set the slots to "all". You can then add your other decoration items.